74ACT373MSAX

Latches Overview

The Fairchild Semiconductor 74ACT373MSAX is an octal transparent latch with 3-STATE outputs, belonging to the ACT logic family. It features eight D-type latches in a single package, designed for bus-oriented system applications. The device operates within a voltage range of 4.5 V to 5.5 V and supports a propagation delay of 8 ns. It provides output drive capabilities of 24 mA for both high and low states. The component is housed in a 20-TSSOP surface-mount package and functions reliably across an operating temperature range of -40°C to 85°C.

Latches Feature Summary

• Octal transparent latch configuration with three-state outputs for bus-oriented applications
• Data appears on the bus when Output Enable (OE) is LOW; high impedance state when OE is HIGH
• Latch Enable (LE) controls transparency; data is latched when LE transitions from HIGH to LOW

Latches Applications

• Bus organized system applications
• Memory interface circuits
• Microprocessor systems

Latches Procurement Notes

Verify the specific manufacturer marking and date code against official Fairchild or ON Semiconductor documentation, as this part number may be associated with legacy production lines. Confirm that the TSSOP-20 package dimensions match your PCB footprint requirements. Ensure compliance with RoHS directives if required by your project specifications, noting that suffix variations may indicate lead-free status.

Latches Selection Notes

Select this component when an octal latch with tri-state capability is required for data storage and bus driving. The ACT series offers speed comparable to TTL while maintaining CMOS power efficiency. Consider the 20-TSSOP package for space-constrained designs. Verify input compatibility with your system's logic levels, as ACT inputs are TTL-compatible.

Latches Part Context

The 74ACT373 is part of the broader 74ACT logic family, which bridges the performance gap between standard AC logic and faster ALST/ALS families. It serves as a direct replacement for older 74LS373 devices in many designs, offering improved switching speeds and lower power consumption. The MSAX suffix typically denotes a tape-and-reel packaging format for automated assembly.

Latches Replacement Considerations

Public confirmed substitute part numbers include 74AC373MTCX and 74ACT373MTCX. These alternatives share similar functional characteristics but may differ in specific electrical parameters or packaging details. Always consult the respective datasheets to ensure pinout and timing compatibility before substitution.